diff --git a/.gitignore b/.gitignore
index 086183e..081405b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /target
 result/
 *.json
+tarpaulin-*
diff --git a/flake.nix b/flake.nix
index 43af2fc..a1fdfeb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -37,7 +37,7 @@
     rust-bin = pkgs.rust-bin;
     
     devShells.default = pkgs.mkShell {
-      nativeBuildInputs = with pkgs; [ gnumake my-rust-bin rust-analyzer ];
+      nativeBuildInputs = with pkgs; [ gnumake my-rust-bin rust-analyzer cargo-tarpaulin ];
     };
   });
 }